JPS6360419A - Microscope for surgical operation - Google Patents

Abstract

PURPOSE:To more safely execute a surgical operation by constituting the titled microscope so that when a fault has occurred in one illuminating optical system, the other illuminating optical system is lighted. CONSTITUTION:In case a light source 10a has been turned off due to some fault, when the light source 10a is turned off, an output of a light receiving element 22a becomes '0', and a control circuit 20a decides an abnormal state that the light source 10a has been turned off, although a switch Sa in ON, and closes a relay contact Tb of a second illuminating optical system. In this way, irrespective of ON and OFF of a switch Sb, a light source 10b is turned on, and an eye E to be examined is illuminated by the second illuminating optical system. The control circuit 20a outputs a driving signal to an alarm device 23, as well, simultaneously with a driving signal to the relay contact Tb, by which the use convenience is further improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a surgical microscope that is always equipped with two or more types of illumination means, such as an ophthalmic surgical microscope.

[Conventional technology] A conventional device of this type will be explained with reference to FIG.

The microscope body 1 has an objective lens 2 facing the eye E to be examined.
, variable magnification lens 3, imaging lens 4, erecting prism 5. An observation optical system consisting of an eyepiece 6 is provided. In addition,
This observation optical system has two optical paths with two optical members corresponding to the left and right eyes of the examiner e, excluding the objective lens 2, and allows the examiner e to stereoscopically observe the eye E to be examined. There is.

A first illumination optical system that is a coaxial illumination system is provided inside the microscope body 1, and illumination light from the first illumination light source 10a is transmitted through a condenser lens lla, an illumination aperture 12a, and a prism 1.
3, the eye E to be examined is illuminated through the objective lens 2 by a prism lens 14 disposed on the side between the objective lens 2 and the variable magnification lens 3. The first illumination light source 10a is Sui.

A second illumination optical system is provided on the side of the microscope main body L to illuminate the subject's eye E from an oblique direction. Illumination light emitted from the light source tob illuminates the eye E through the condenser lens llb, the illumination diaphragm 12b, and the lens 16. The second illumination light source 10b is activated by a power source 15b via a switch sb and a dimming resistor Rb. Note that each of the illumination stops 12a and 12b, the focal position F1 of the objective lens 2, and the focal position F2 of the eyepiece lens 6 are conjugate with each other.

The examiner e turns on the switch Sa or sb as necessary to illuminate the eye E to be examined using either the first or second illumination optical system, and at the same time illuminates the eye E to be examined using the observation optical system. Normally, the illumination light sources 10a and 1Ob are turned on near the upper limit of the rated current so that the examiner e can observe the eye E with sufficient brightness even through the observation optical system. For this reason, the lifespan of the illumination light sources 10a and 10b cannot be said to be long, and the illumination light sources 10a and 10b are sometimes used during surgery.

The drawback is that 10b may break and the surgery must be interrupted.

To address this drawback, a method has been adopted in which the illumination light sources 10a and 10b are made into a unit so that they can be easily replaced and the replacement time is shortened, but this is not a fundamental solution. Turning off the light even temporarily creates an extremely dangerous situation as surgical procedures have become more sophisticated in recent years, and it is urgent to eliminate this drawback.

[Object of the Invention] An object of the present invention is to provide a surgical microscope that eliminates the drawbacks of the conventional example described above and allows safer surgery by automatically switching the illumination optical system.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide a surgical microscope having a plurality of illumination means each having an independent light source and a switch for turning on and off each of these light sources. Although there is a light emission detection means for detecting each light emission, a switch detection means for detecting on/off of the switch, and an output from one of the switch detection means, the output of the light emission detection means for the corresponding light source is The surgical microscope is characterized by comprising a control means for turning on the switch of the other light source to light up the other light source when the other light source is not present.

[Embodiments of the Invention] The present invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2. The basic components of this embodiment are almost the same as those shown in FIG. 3, and the explanation thereof will be omitted.

Switch S that lights up the first and second power supplies 10a and 10b
a and Sb are each of a double-pole single-throw type, and one of the contacts is used to turn on and off each light source 10a and lob, as in the conventional example.

The other contact is connected to the control circuits 20a and 20b, and the on/off state of each switch Sa and Sb is controlled by the control circuit 20a.
, 20b. Furthermore, control circuits 20a, 20
b, each light source 10a, via amplifiers 21a, 21b;
The outputs of light receiving elements 22a and 22b arranged near the fob are connected.

According to the outputs of these light-receiving elements 22a and 22b, the control circuit 20a drives a relay contact Tb of the normal oven provided in parallel with the switch sb, and the control circuit 20b drives a similar relay contact Ta provided in parallel with the switch Sa.
is configured to drive.

To explain the operation of this microscope, switch S
a is on, switch sb is off, and the eye E to be examined is in the first
Consider the case where the light is illuminated by the illumination optical system. Since the terminal of the switch Sa is closed, the control circuit 20a detects that the switch Sa is in the on state, and changes the output of the light receiving element 22a that has received the illumination light from the light source 10a to 1, for example, a comparison circuit, etc. , it is detected that the light source 10a is in the lighting state, and it is determined that the light source 10a is in a normal operating state. In this state, the control circuit 20a
No drive signal is emitted to the relay contact Tb of the illumination optical system, and the normal operating state is maintained.

Next, consider a case where the light source 10a is turned off due to some kind of failure. When the light source 10a is turned off, the output of the light receiving element 22a becomes 0, and the control circuit 20a determines that there is an abnormal state in which the light source 10a is turned off even though the switch Sa is on, and turns on the second illumination optical system. Close the relay contacts. Since the relay contact Tb is arranged in parallel with the lighting switch sb, the light source 10b lights up regardless of whether the switch 2,000 sb is on or off, and the second illumination optical system illuminates the eye E.
is illuminated.

The WA functions of the switch Sb, control circuit 20b, etc. connected to the second illumination optical system are the same as those described in 4 above, so the explanation will be omitted, but in any case, if the light source that should be turned on does not turn on. The effect that the other light source is immediately turned on is the same.

The control circuit 20a simultaneously receives a drive signal for the relay contact Tb.
As shown in FIG. 2, by outputting a drive signal also to the alarm device 23, usability can be further improved. The alarm device 23 may be, for example, an electronic buzzer or the like, and the examiner can recognize that the device is in an abnormal state by this alarm.

At this time, if the surgery can be temporarily interrupted, it may be necessary to interrupt the operation and take measures such as replacing the illumination light source.If the operation cannot be interrupted, the assistant may carry out the previous procedure, or other measures may be taken. The surgery may be continued with illumination by the illumination optical system.

[Effects of the Invention] As explained above, in the surgical microscope according to the present invention, even if a failure occurs in one illumination optical system, the other illumination optical system is immediately turned on, so the field of view of the microscope becomes dark and the surgery cannot be continued. Furthermore, if the alarm is sounded at the same time as the lights are turned off in an emergency, it will be possible to quickly respond to the above-mentioned malfunctions, which will have the effect of increasing the safety of microsurgery.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a surgical microscope according to the present invention;
FIG. 2 is a block diagram of the alarm device, and FIG. 3 is a block diagram of a conventional example. Reference numeral 1 is the microscope main body, loa, 10b is the illumination light source, 15
a, 15b are light source power supplies, 20a, 20b are control circuits, 2
2a, 22b are light receiving elements, 23 is an alarm device, Sa, S
b is a double-pole single-throw switch, and Ta and D are relay contacts.

Claims (1)

[Scope of Claims] 1. In a surgical microscope having a plurality of illumination means each having an independent light source and a switch for turning on and off each of these light sources, a light emission detection means for detecting the light emission of each of the light sources; There is a switch detection means that detects whether the switch is on or off, and if there is an output from one switch detection means, but there is no output from the light emission detection means for the corresponding light source, the switch of the other light source is turned on. and control means for turning on the other light source. 2. The surgical microscope according to claim 1, wherein the control means for lighting the other light source operates together with means for issuing an alarm to the examiner.